| Caerphilly to Oststeinbek | 577.42 mi (929.26 km) |
| Caerphilly to Ottendorf-Okrilla | 733.90 mi (1,181.09 km) |
| Caerphilly to Ottersberg | 531.89 mi (855.99 km) |
| Caerphilly to Ottobrunn | 704.93 mi (1,134.48 km) |
| Caerphilly to Ottweiler | 481.04 mi (774.17 km) |
| Caerphilly to Overath | 456.40 mi (734.51 km) |
| Caerphilly to Oyten | 526.14 mi (846.73 km) |
| Caerphilly to Paderborn | 512.78 mi (825.25 km) |
| Caerphilly to Papenburg | 459.59 mi (739.64 km) |
| Caerphilly to Parchim | 644.45 mi (1,037.14 km) |
| Caerphilly to Pasewalk | 733.76 mi (1,180.87 km) |
| Caerphilly to Passau | 766.39 mi (1,233.38 km) |
| Caerphilly to Pattensen | 554.59 mi (892.53 km) |
| Caerphilly to Pegnitz | 657.45 mi (1,058.07 km) |
| Caerphilly to Peine | 574.31 mi (924.26 km) |
